Locomotive-feed-water heater.



H. H. VAUGHAN.

LOCOMOTIVE FEED WATER HEATER.

3 SHEETSSHEET l.

INVENT? wmkwzz z WITNESSES All'ys H. H. VAUGHAN.

LOCOMOTIVE FEED WATER HEATER APPLICATION FlLED SEPT. 20. I913- fi T q Patented July 2, 1918.

3 SHEETSSHEET 2.

INVENTOR H. H. VAUGHAN.

LOCOMOTIVE FEED WATER HEATER.

APPLICATION FILED SEPT. 20, I913. 1 ,WQWQD Patented July 2,1918.

3 SHEETS-SHEET 3' WITNESSES W Wi retirees.

HENRY H. VAUGHAN, F MONTREAL, CANADA, ASSIGNOR 0F ONE-THIRD T0 LE GRAND FISH, OF NEW YORK, N. Y., AND ONE-THIRD T0 THORWALD 1E. GRAHN', 0F CLEVE- Lenin, UHJIO.

Specification of Letters Patent.

LOCOMOTIVE-FEED-WATER HEATER).

Patented July TFHTF.

Application filed September 20, 1913. Serial No. 790,845.

To all whom it may concern:

Be it known that T, HENRY H. VAUcHAN, a citizen of the United States, residln at Montreal, in the Dominion of Canada, ave\ invented certain new and useful limprovements in Locomotive-Feed-Water Heaters, of which'the following is a specification.

The invention relates to feed-Water heaters, and in its preferred embodiment to feedwater heaters for locomotives. The invention has for its objects, the provision of an improved arrangement of the supplemental heating tank or compartment as applied to a tender; the provision of an arrangement of thermostatic controlling means wherein a more certain and direct control of the steam for heating the water is secured; and the provision of improved means whereby the pressure in the pipe supplying steam to the heating tank is reduced. One embodiment of the invention is illustrated in the accompanying drawings, wherein- Figure 1 is a side elevation of a locomotive and tender provided with my improved feed-Water heating means; Fig. 2 is a horizontal section taken on the lines l[l[ T-l[ of Figs. 1 and 4; Fig. 3 is a vertical section on the line TIT-TIT of Fig. 2; Fig. 4: is a vertical section longitudinal of the tender, on the line IVIV of Fig. 2, looking in the direction-of the arrows, and Figs. 5 and 6 are enlarged detail sectional views of the nozzle and thermostatic devices employed.

In order to provide for the rapid and economical heating of a relatively small portion of the water in the tender, a heating compartment is provided which is walled pit from the main body of water in the tender, but in communication therewith, so that fresh water may be supplied tothe compartment as the heated water is withdrawn by the locomotive injectors. According to my present invention this heating compartment is preferably arranged transversely of the tender at the front end thereof, and lies beneath the inclined floor of the coal compartment. The heating medium is preferably exhaust steam from the locomotive cylinders and the pum s, although live steam might be employed i desired. In the preferred embodiment of the invention the steam for heating the water in the heating tank is supplied to one end of such tank by means of a pressure reducing nozzle, and the heated water is withdrawn from the other end of such heating tank, the thermostatic means for governing the supply of steam to the heating compartment being located in a well which constitutes a portion of the passageway leading to the injectors. This arrangement insures a rapid and posit ve actuation of the thermostatic controlllng means, and this in turn gives a closer regulation of the temperature of. the water find a more reliable operation of the injecors.

Referring first to the general arrangement of parts as shown in Fig, 1, A and B are the locomotive and tender respectively -to which the apparatus is illustrated as applled; C is the pipe for conducting the exhaust steam from the cylinders pump to the tender; l) is the plpe carried by the tender, to which the steam pipe C is connected; E is the thermostatic means for governlng the supply of steam to the water of the tender; F is the heating compartment extending transversely of the front portion of the tender to which the steam from the pipe D is supplied; and G is the hot water outlet pipe leading from the heating compartment F to the injector H.

The construction and location of the compartment F will be understood by reference to Figs. 2, 8, and 4. By reference to these figures it will be seen that this portion of the water tank is walled ofi from the other portions of the tank, by means of the plates 1, 2, and 3 (Figs. 2 and 3), plate 1 serving to close the rear side of the tank and the plate 3 serving to partially close the left and end of the tank. The compartments 4 and 5 of course carry the main body of water in the tank, and free communication is afforded between the compartment 5 and the compartment F by means of the passageway 6 beneath the edge of the plate 3.

partment reduces the number of additional walls necessary to close ofi the compartment F, to a minimum,

Steam is supplied to a pipe 8 extending longitudinally of the heating compartment F (Figs. 2 and 3) from the supply pipe D. Steam from this pipe D passes up through tit and from the tilt) to the bottom plate of the compartment,

the valve casing 9, past the valve 10, to a compartment 11 with which the pipe 12 communicates, and thence to the pipe 8 via the pipe sections 13, 14:, and 15 (Fig. 2). The valve 10 is controlled thermostatically in a manner to be hereinafter described, and the casing 9 carrying the valve 10 1s inclosed in'a box 16 of sheet metal set into the compartment F. z

In order to reduce the back pressurem the steam pipe 8 the nozzle construction shown in enlarged section in Fig. 5 1s employed. The end of the pipe 8 1s provlded with a converging nozzle 1 and 1nclos1ng this nozzle 17 are pair of oppositely converging nozzles 18 and 19, the nozzle 18 being supported by means of the brackets 20, so that free access of water to the rear end of the nozzle 18 is provided. The outer surface of the nozzle 17 is spaced away from the interior surface of the nozzle 18, so that a flow of water may' occur through the annular space thus provided. This nozzle I have found operates upon the injector principle and serves to materially reduce the back pressure in the'plpe 8 incident to the forcing of the steam -into the water of the heating compartment. The apparatus ust described tends to force the water in the reduced portion of the tank F longltudinally thereof toward the enlarged portion at the right hand end of such compartment, thus tending to increase the pressure in such portion of the compartment from which the heated water is withdrawn. As a result the operation of the injector is assisted to a greater or less degree. A well 2 is secured such well being provided with the outlet pipe G (Figs. 1, 2, and 4) leading to the inector H.

In the well 21 is located the thermostatic controlling device E shown in enlarged section in Fig. 6, such themostatic controlling means being designed to operate the valve 10 for controlling the supply of steam to the'heating compartment F. In the form of apparatus as lllustrated in Fig. 6 the expansible member consists of a box 22 carried by a supporting bracket 23 and adapted to secure the reciprocation of the yoke 24 and the valve operating stem 25 carried thereby, the valve 26 at the end of the stem 25 being normally held closed by the spring 27 when the temperature of the water in the compartment F is below a predetermined oint. A pressure supply pipe 28 leading rom any desired source of air pressure supplies air to the chamber 29 when the valve 26 is unseate'd, -and this chamber 29 communicates with the cylinder 30 (Fig. 3) by means of the pipe 31. Mounted in the cylinder 30 is the pis on 32 connected by means of the stem s own, to the valve 10. When the temperatue of the water in the well rises above the predetermined point for which the thermostat is set, the expansion of the liquid t in the box 22 causes the yoke 24 and the stem 25 carried thereby to move to the right,-

thereby o ening the valve 26 and permitting pressure rom the supply pipe 28 to pass to the cylinder 30, moving the valve 10 to closed position and shutting ofi' the supply than where the thermostatic controlling means is located in the heating compartment itself. This is due to the fact that the thermostat is located in the line of flow so that .it is acted upon promptly by the hot 'water at substantially the temperature at which such water is to be used in the injector, the thermostat at the same time by reason of its position being protected from the direct impact of the liquid from the inlet nozzle. The arrangement has the further advantage that the thermostat is more accessible than if it were located in the body of the heating compartment F, the well or pocket 21 being readily removed when it is desired to adjust or replace the parts of the thermostat. A similar advantage is incident to the placing of the valve casing 9 in the' pocket 16, the valve casing being readily accessible in such position, and at the same time being out of the way. Other advantages incident to the construction will be apparent to those skilled in the art.

What I claim is:

1. In combination in a tender having a coal compartment with a downwardly inclined bottom and Water compartments at the sides of and beneath the said coal compartment, a heating compartment beneath the said inclined bottom at the front end thereof and extending transversely of the tender, means for supplying steam to the said heating compartment, a communication for supplying water to the said heating compartment from the other water compartments, and means for conducting the heated water from said heating compartment.

2. In combination in a tender having a coal compartment with a downwardly inclined bottom and Water compartments at the sides of and beneath the said coal compartment, a heating compartment beneath the said inclined bottom at the front end thereof and extending transversely of the tender, means for supplying steam to the said heating compartment adjacent one end thereof, a communication for supplying water to the said heating compartment at the said end from the other water compartments, a well adjacent the opposite end of said heating compartment, and a water outlet pipe leading from said well.

3. In combination with a heater having a coal con'ipartment with a downwardly inclined bottom and water compartments at the sides or and heneath the said coal compartments, a heating compartment beneath the said inclined bottom at the front end thereof and extending transversely of the tender, means for supplying steam to the said heating compartment, a passageway hetween one end of the heating compartment and an adjacent water compartment, means for supplying steam into the heating compartment in the direction of the other end of said heating compartment, and an outlet pipe leading from said other end of the heating compartment.

a. in combination in a tender having a coal compartment with a downwardly inclined bottom and water compartments attender, means for supplying steam longitudinally of the portion of the heating compartment having the smaller cross sectional area and toward the enlarged portion of the compartment, a communication for supplying water to the heating compartment from an adjacent compartment, and an outlet leading troin the enlarged portion ol? the compartment.

5Q lln combination in teed water heating apparatus, a compartment having a portion ot relatively small cross sectional area and a portion of larger cross sectional area a steam supply pipe leading into the com partment adjacent the smaller end thereof, and a pair of conical nozzles connected at their reduced ends and hitting o'verthe end of the saidsteam supply pipe with such end adjacent the reduced portions oil the nozlz'les hut spaced away therefrom.

lln testimony whereof l have signed my name to the specification in the presence of two witnesses.

l-llENltY HQ VAUGHAN, Witnesses:

Gonnon' G. (looms, Wmtmrr d. C. ll-lnwnrson.

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